Question 1 of 25
Hints left: 3
Q1
A relation has which of the following properties?
Q2
When mapping a regular entity into a relation which of the following is true?
Q3
The primary key in a relation does not need to be underlined.
Q4
Normalization is a formal process for deciding which attributes should be grouped together in a relation.
Q5
Weak entities do not get mapped into a relation.
Q6
If no multivalued attributes exist in a relation, then the relation is in what normal form?
Q7
A composite attribute does not get mapped into a relation.
Q8
A null value is assigned when no other value applies.
Q9
The relational model consists of:
Q10
When mapping a binary many-to-many relationship into a relation which of the following is true?
Q11
A relation is a two-dimensional table.
Q12
In a 1:M relationship, the primary key on the one side migrates to the many side to become the foreign key on the many side.
Q13
When mapping a ternary relationship with an associative entity into a relation which of the following is true?
Q14
A foreign key is which of the following?
Q15
When mapping a supertype/subtype relationship which of the following is true?
Q16
A synonym is two or more attributes that have different names but the same meaning.
Q17
When mapping a multivalued attribute into a relation which of the following is true?
Q18
A transitive dependency is which of the following?
Q19
The entity integrity rule states that:
Q20
When mapping a many-to-many unary relationship into a relation which of the following is true?
Q21
If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?
Q22
A primary key may be null.
Q23
An enterprise key is a primary key whose value is unique for a given relation.
Q24
A primary key is which of the following?